| KSP_CONVERGED_RTOL (residual 2 | - norm decreased by a factor of rtol, from 2-norm of right hand side)
|
| KSP_CONVERGED_ATOL (residual 2 | - norm less than abstol)
|
| KSP_CONVERGED_ITS (used by the preonly preconditioner that always uses ONE iteration, or when the KSPConvergedSkip() convergence | - test routine is set.
|
| KSP_CONVERGED_CG_NEG_CURVE | - . KSP_CONVERGED_CG_CONSTRAINED
|
| KSP_CONVERGED_STEP_LENGTH | - . KSP_DIVERGED_ITS (required more than its to reach convergence)
|
| KSP_DIVERGED_DTOL (residual norm increased by a factor of divtol) | - . KSP_DIVERGED_NANORINF (residual norm became Not-a-number or Inf likely due to 0/0)
|
| KSP_DIVERGED_BREAKDOWN (generic breakdown in method) | - - KSP_DIVERGED_BREAKDOWN_BICG (Initial residual is orthogonal to preconditioned initial
residual. Try a different preconditioner, or a different initial Level.)
|
See also manual page for each reason.
guess: beginner
Notes: Can only be called after the call the KSPSolve() is complete.
Keywords
KSP, nonlinear, set, convergence, test
See Also
KSPSetConvergenceTest(), KSPConvergedDefault(), KSPSetTolerances(), KSPConvergedReason
Level:intermediate
Location:src/ksp/ksp/interface/iterativ.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages
Examples
src/ksp/pc/examples/tutorials/ex1.c.html
src/ksp/pc/examples/tutorials/ex2.c.html
src/ksp/ksp/examples/tutorials/ex10.c.html